Expression for "be humble”?

Is there an English expression to convey the idea that the interlocutor is being a bit too full of themself and needs to be a little humbler?

In Italian we have an expression abbassare la cresta that literally translated is “lower your comb/crest”; are there any corresponding expressions for this in English?

"Get off/come down off your high horse":

Fig. to become humble; to be less haughty. It's about time that you got down off your high horse. Would you get off your high horse and talk to me?

(The Free Dictionary)

"Get over yourself"

This is widely used in America (at least the parts I'm familiar with). It implies that the person being spoken to is overly impressed or pleased with himself, and needs to "get over" that feeling, or return to a more impartial attitude.